FULL PRODUCT VERSION :
java version "1.5.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-b64)
Java HotSpot(TM) Client VM (build 1.5.0-b64, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Linux gao-2004.weiqigao.com 2.4.22-1.2149.nptl #1 Wed Jan 7 12:57:33 EST 2004 i686 athlon i386 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
On a panel with a JTree (tree), and two JTextFields (f1 and f2), if the TreeSelectionListener to tree is programmed to disable the text fields when a non-leaf node is selected, and enable the text fields when a leaf node is selected, then clicking on f1 and then a non-leaf node results in f2 getting the focus.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Run java MyFrame
2. Click on "Field 1"
3. Click on "colors" tree node

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
[Tue Jan 27 21:49:51 CST 2004]: FOCUS_GAINED on tree
[Tue Jan 27 21:49:55 CST 2004]: FOCUS_LOST   on tree opposite f1
[Tue Jan 27 21:49:55 CST 2004]: FOCUS_GAINED on f1   opposite tree
[Tue Jan 27 21:49:57 CST 2004]: FOCUS_LOST   on f1   opposite tree
[Tue Jan 27 21:49:57 CST 2004]: FOCUS_GAINED on tree opposite f1

tree has focus
ACTUAL -
[Tue Jan 27 21:49:51 CST 2004]: FOCUS_GAINED on tree
[Tue Jan 27 21:49:55 CST 2004]: FOCUS_LOST   on tree opposite f1
[Tue Jan 27 21:49:55 CST 2004]: FOCUS_GAINED on f1   opposite tree
[Tue Jan 27 21:49:57 CST 2004]: FOCUS_LOST   on f1   opposite tree
[Tue Jan 27 21:49:57 CST 2004]: FOCUS_GAINED on tree opposite f1
[Tue Jan 27 21:49:57 CST 2004]: FOCUS_LOST   on tree opposite f2
[Tue Jan 27 21:49:57 CST 2004]: FOCUS_GAINED on f2   opposite tree

tree does not have focus

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import javax.swing.*;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeNode;
import java.awt.*;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.util.Date;

public class MyFrame extends JFrame implements FocusListener, TreeSelectionListener {
    JTree tree = new JTree();
    JTextField f1 = new JTextField("Field 1", 20);
    JTextField f2 = new JTextField("Field 2", 20);
    JComponent[] fields = {f1, f2};

    public MyFrame() {
        super("MyFrame");
        layoutGui();
        hookupListeners();
        mainLoop();
    }

    private void layoutGui() {
        Container contentPane = getContentPane();

        contentPane.setLayout(new GridBagLayout());
        tree.expandRow(1);
        contentPane.add(tree, new GridBagConstraints(0, 0, 2, 1, 1.0, 0.0,
                GridBagConstraints.NORTHWEST, GridBagConstraints.HORIZONTAL,
                new Insets(16, 16, 8, 16), 0, 0));
        contentPane.add(f1, new GridBagConstraints(0, 1, 1, 1, 1.0, 0.0,
                GridBagConstraints.NORTHWEST, GridBagConstraints.HORIZONTAL,
                new Insets(8, 16, 8, 16), 0, 0));
        contentPane.add(f2, new GridBagConstraints(0, 2, 1, 1, 1.0, 0.0,
                GridBagConstraints.NORTHWEST, GridBagConstraints.HORIZONTAL,
                new Insets(8, 16, 16, 16), 0, 0));
    }

    public void hookupListeners() {
        tree.addFocusListener(this);
        f1.addFocusListener(this);
        f2.addFocusListener(this);
        tree.addTreeSelectionListener(this);
    }

    public void mainLoop() {
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        pack();
        setVisible(true);
    }

    public void focusGained(FocusEvent fe) {
        inspectFocusEvent(fe);
    }

    public void focusLost(FocusEvent fe) {
        inspectFocusEvent(fe);
    }

    private void inspectFocusEvent(FocusEvent fe) {
        StringBuffer buffer = new StringBuffer("[" + new Date().toString() + "]: ");

        String str = fe.getID() == FocusEvent.FOCUS_GAINED ? "FOCUS_GAINED on " :
                fe.getID() == FocusEvent.FOCUS_LOST ? "FOCUS_LOST   on " :
                "";
        buffer.append(str).append(findComponentName(fe.getSource()));

        if (fe.getOppositeComponent() != null) {
            buffer.append(" opposite " + findComponentName(fe.getOppositeComponent()));
        }

        System.out.println(buffer.toString());
    }

    private String findComponentName(Object component) {
        return component == f1 ? "f1  " :
                component == f2 ? "f2  " :
                component == tree ? "tree" :
                "";
    }

    public void valueChanged(final TreeSelectionEvent e) {
        Object obj = e.getNewLeadSelectionPath().getLastPathComponent();
        if (obj instanceof TreeNode) {
            for (int i = 0; i < fields.length; i++) {
                fields[i].setEnabled(((TreeNode) obj).isLeaf());
            }
        }
    }

    public static void main(String[] args) {
        new MyFrame();
    }
}
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Surround the content of the valueChanged() method with SwingUtilities.invokeLater().
###@###.### 10/16/04 18:45 GMT